Mining machine



10 Sheets-Sheet 1 Feb. 21, 1928.

E C MORGAN MINING MACHINE O11g1na1 F led Apr 24, 1916 Wittuesl Feb.: 21, 1928.

E. C. MORGAN MINING MACHINE Original Filed April 24. 1916 10 Sheets-Sheet 2 QB MUN NQN WW Feb. 21, 1928.

E. C. MORGAN MINING MACHINE Original Filed April 24, 1916 10 Sheets-Sheet :5

w w a Q #2 Feb. 21', 1928.

E. c. MORGAN MINING MACHINE CTiginal Filed April 1916 10 Sheets-Sheet 4 Feb. 21, 1928.

E. C. MORGAN MINING MACHINE Griginal F r d April 24, 1916 10 Sheets-Sheet 5 E. C. MORGAN MINING MACHINE Feb, 21, 1928.

10 Sheets-Sheet 6 Original Filed April X R v In z/enzor HCIMOVQWI M W a 1 Feb. 21, 1928.

E. C. MORGAN MINING MACHINE l0 $heets$heet 7 Original Fil d A ril 24, 1916 u I 4 4 Q "M m" s l. I E U// h///// m a 4. W M

Feb. 21, 1928. 1,659,889

I E. c. MORGAN MINING MACHINE Original Filed April 24, 1916 10 Sheets-Sheet 8 z/z wz Y Kim, f /f 10 Sheets-Sheet 9 Uni/614103 ,ZZnuuZ 6/70 ri Feb. 21, 1928.

E C MORGAN MINING MACHINE Omgmal F led Apr 24 1916 Feb. 21, 1928. 1,659,889

E. C. MORGAN MINING MACHINE Original Filed April 24, 1916 -10 Sheets-Sheet l0 A ;/7& .7%;16

Patent Feb. 21, 1928.

UNITED STATES PATENT. OFFICE.

EDMUND C. MORGAN, OF NEW YORK, N. Y; OLIVE EUGEN IE MORGAN EXECUTRIX OF SAID EDMUND U. MORGAN, DECEASED.

MINING MACHINE.

I Application filed April 24, 1916, Serial No. 93,048. Renewed. February 26, 1923.

This invention relates to machines for mining coal and other similar substances, and has for its object, the provision of a device of the character named, which shall be ft of improved construction, and more eificient and economical in operation than devices of the character previously made. I

The invention is exemplified 1n the combination and arrangement of parts shown 1n the accompanying drawings and described in longitudinal vertical sectional View of the machine shown in Figs. 1 to 4.

Fig. 7 is a vertical sectional view on line 2 7-7 of Fig. 6.

Fig. 8 is a vertical sectional View substantially on line 8-8 of Fig. 3.

Fig. 9 is a vertical sectional view substan tially on line 9--9 of Fig. 15.

' F 1 10 is a horizontal sectional view substantially on line 1010 of Fig. 15.

F i 1.1 is a horizontal sectional view substantially on line 11-11 of Fig. 15. I

Fig, 12 is a top plan view of the main base plate of the machine.

Fig. 13 is a bottom plan view of a movable scoop and conveyor forming a part of the mining machine. i

,Fig. 14 is a top plan view of the device 40 shown in Fig. 13.

Fig. 15 is a fragmentary elevational view of the driving mechanism for the cutterhead.

Fig. 16 is a horizontal sectional view showing a modified form of cutter-head; and,

Fig. 17 is a vertical sectional view of a detail of construction.

In the drawings, the numeral 20 designates the main base plate on which the greater part vention is mounted. This plate is provided with an upturned flange 21 extending around the edges thereof, for the purpose of strengthening the plate. The central portion of the plate is provided with a somewhat extended flat supporting surface 22 on which parts of the machine to be described slidably rest. The plate 20 is provided at its forward end with an extension 23,- having a standard 24 I projecting upwardly therefrom and secured to the plate by lag screws 25, (Fig. 5). The standard 24 carries .a pair of pivot bolts 26 and 27, which project from the standard at opposite sides thereof to form pivotal supports for the swinging arms 28 and 29, there being a pair of arms 28 supported on the lower bolt 26, and a second'pair of arms 29 supported on the upper bolt 27. The arms 28 and 29 are pivoted at the forward ends on pivot bolts 30 and 31 respectively, which are carried by a link 32'extending between the pivot bolts 30 and 31 and holding them in fixed relation to one another. By this construction, a vertically swinging arm is provided which constitutes a parallel motion device arranged to hold the link 32 in a vertical position, regardless of the angle of'the swinging arm.

' The 'arms 28 are connected near the pivot 26 by a plate 33 (Fi 5), secured to the inner side of the arms y means of la screws 34. The plate 33 constitutes a plat orm on which a motor 35 is mounted, connected by a worm and worm wheel enclosed in a casing 36, with a shaft 37 mounted in journals 38, carried by the arms 28. The shaft 37 has secured thereto a pair of pinions 39, which mesh with the teeth of arcuate' racks 40, se'- cured to the base 23 and projecting upwardl therefrom. The rotation of the motor 35,

k ives the pinions 39, and thus swings the arms 28 and29 upwardly or downwardly about their pivots 26 and 27, the direction of the pivotal movement of the arms 28 and 29 depending upon the direction of rotation of the motor 35. The motor 35 is governed by one of a series of controllers 41, which controllers are connected with the various motors for driving the difierent parts of the machine, and are arranged to govern both the y 68, supported on the platform 48.

speed and direction of the motors which they.

control. n

The cutter-head for severing the material from a mine vein is carried by the link 32, and is best shown in Figs. 1, 3, 5, 9, 10, 11, 15 and 17. Projecting forwardly in a hor1- zontal direction on a line with the lower portion of the arm 28 is a supporting bracket 42, which is extended laterally, as shown in Figs. 9, 10 and 15, to form a circular rack 43, which is rigid with the bracket 42. At the center of the rack 43, the bracket 42 is provided with an opening in which a bolt is journaled for rotation. The bolt 44 1S held in place by a nut 45, and the upper end of the bolt passes through a yoke member 45, which is arranged to rotate with the bolt 44 about the axis formed by the bearing of the bolt in the bracket 42. The bolt 44 is pro vided with a rim or head 47, which securely holds the yoke 46 in place. The lower member of the yoke 48 is extended laterally, as shownin Figs. 9 and 10, to form a supporting platform or table 48, on which is mount- V ed a motor 49 for operating the mechanism in the cutter-head. At the forward end of the platform 48, theyoke 46 is continued forwardly to form the lower arm 50 of a loop core cutter frame. The arm 50 of the cutter frame is offset downwardly from the level of the platform 48, as shown in Figs. 3 and 15. A connecting bar 51 projects upwardly from the arm 50, and is connected at its upper end with the upper cutter frame bar 52. As shown in Figs. 9 and 11, the bar member 53, of the yoke 46, is secured to a bracket 55, which projects forwardly from the upper end of the link 32. The arm 53 is held for pivotal movement, relative to the bracket 55, by means of a bolt 56, which is journaled in the bracket, and held in place by a nut 57. The lower end of the bolt 56 is provided with a flange or head 58, which holds the arm 53 in position, relative to the bracket 55.. The bolts 44 and 56 are in axial alignment with. one another, and together constitute a pivot about which the yoke 42 swings horizontally. The bracket 55 is extended laterally, as shown in Figs. 1, 3, 5, 9, 11 and 15, to form a circular plate 60, having a downturned flange 61. at its periphery, provided with internal'rack teeth 62, forming a circular rack, for a purpose to be explained.

As shown in Fig. 10, the supporting plate 48, of the yoke 46, is provided with an arm 65, which carries a bearing 66, in which one end of a shaft 67 is journaled. The shaft 67 extends transversely of the cutter-head, and has its end opposite that, journaled in the bearings 66, carried by a second journal The shaft 67 is connected with the motor 49 by means of a worm and worm wheel enclosed in the casing 69, (Figs. 5 and 10). Rigidly secured to the shaft 67, is a sprocket wheel neeaeee -1neshes with a worm wheel 76, as shown in Figs. 10 and 15. As shown in Fig. 17 ,the worm. wheel 76 is splined to a clutch sleeve 77, which is mounted to move freely on a vertical shaft 78, rigidly secured at its upper end to a pinion 79. The pinion 79 is journaled, as shown in Figs. 15 and 17, in

the upper plate 53, of the yoke 46. Thelower end of the shaft 78 is carried for rotat'on in a sleeve 80, which is provided with a clutch member 81, arranged to co-operate with the clutch sleeve 77, and at the opposite end, with a inion 82. The sleeve 80 is journaled in a caring 83, which is secured to the lower member 48, of the yoke 46, at a point adjacent the bearing member 66. The lower end of the clutch sleeve 77 is journaled in a bearing 84, supported inaxial alignment with the bearing 83 by a bracket 85, secured to the member 48, by lag screws 86. The clutch sleeve 77 is provided with flanges 87, which cooperate with a lever 88,

having a handle 89, by means of which the sleeve 77 may be moved vertically along the shaft 78. When the sleeve 77 is in its uppermost position, the pinion 79 is clutched to the worm Wheel 76, and is thus connected to be driven by the motor 49 through the shaft 67 and the worm in the casing 69.. When the clutch sleeve 77 is in its lowermost position, the inion 82 will be clutched to the worm wheel 6, by means of the sleeve 89, to be driven by the motor 49. The clutch 77 may also be moved to an intermediate neutralposition.

As shown in Figs. 11 and 15, the pinion 79 meshes with an idler 90, which in turn meshes with a gear 91, which is formed rig lit) idly with a pinion 92, meshing with the teeth 62 of the circular rack 61/ In this way, the pinion 79 is connected by means of a train of reduction gearing with the rack 61, so that when the pinion 79 is driven by the motor 49, the pinion 92 will travel around the interior of the rack 61, and thus carry the yoke 46 and the parts supported thereby in a horizontal direction about the bolts 44 and 56, which constitute a vertical pivotal axis for this movement. It will be seen that this motion will be a slow and powerful one, and it is used for feeding the cutter frame forwardly while making a cut in the material to be mined. The pinion 82, as shown in Figs. 10 and-15, meshes with the rack 43 directly, so that aeeaeae,

when this pinion is -driven by the worm wheel 78, the yoke 46 will be rotated about its vertical axis much more rapidly, than when the motion is transmited through the pinion'79; For this reason, the pinion 82 and rack 43 are used when it is desired to impart a rapid movement to the cutter bar, as when the bar is being returned to a position to begina new out. In order that the clutch 77 may be controlled from either side of the machine, the clutch member. 88 'is mounted on ashaft 95, which carries handles 89, located one at each side of the cutter-head, as shown in Fig. 1.

It will be seen from Fig. 1, that the rotation of the cutter bar about its vertical axis, will form a kerf when the machine is properly positioned in the face of a mine vein, which will sever a crescent-shaped section of material from a mine vein. As will be seen fronr-"Fig. 5, a number of cuts may be taken, one above the other, for each position of the machine, the upper and lower kerfs always being formed in a horizontal plane, regardless of the height to which the cutter-head is adiusted by the arms 28 and 29. By this arrangement, the cutter will cleave the material from the floor and roof of the mine, flush with the floor and roof, thus making a perfectly clean smooth surface at both top and bottom of the mine chamber, and severing all of the material from the floor and roof of the mine. Because of this arrangement, it is possible to construct the ma chine to swing through a much larger vertical angle, than would be practical if the loop cutter were tilted at the same angle as the supporting arm, because if the cutter were tilted with the arm, and the arm raised to a considerable height, the cutter would be so displaced thatthe upper cuts would only form great notches, in the roof 'of the mine, leaving a considerable part of the material adhering to the roof.

- It should be noted that the cutting mechanism shown in Fig. 3 is adjustable in elevation independently of the gathering mechanism comprising the widely expanded plate 116 shown in Fig. 1 and the traveling conveyer comprising the flights 101. The forward arcuate edge of the plate 116 is beveled, as shown at 117 in Fig. 5, so as to have a scraping action over the floor of the mine chamber and direct material onto the conveyer. The platform is therefore wedged under the material and the latter holds the platform a ainst the floor and prevents the tendenc 0% the platform to ride up on' the materia It should be noted that the upper surface of the platform is sloped gradually toward the rear at an angle much less than the angle of repose of such material as coal on a metal surface. The athering mechanism may be advanced and retracted independently ofthe adjustment inelevation of the kerf-cutting mechanism. Therefore the cutting operation may be proceeded with while material is broken down, gathered by the scooping plate or conveyer pan and transferred by flight coveyer to the mine car at the rear end of the machine. The gathering mechanism in a, machine constructed as a loading machine is described and claimed in the divisional application, Serial NO.. 630,831, filed April 9, 1923, for an Improvement in loading machines.

By referring to Figs. 3 and 5 of the accompanying drawings it will be 'seen that the parallel bars 28 and 29- constitute link-- form members between the main or supporting frame and the supplemental frame 32. The connections between the main and supplementalfram'es' comprise a plurality of ar ticulations, including the hinges at 26, '27 and 30. 31. These hinges or pivots are on axes which are parallel to each other and the plane extending through the pair of axes at 26, 27 is parallel to the plane-extending through the axes at 30, 31. The operator-controlled power-operated mechanism for adjusting the elevation of the cutting mechanism is applied to one of the linkform members 28, as shown in Figs. 3 and 5, whereas the supplemental frame 32 carries operator-controlled power operated mechanism for swinging or arcuately feeding the Figs. 1 and 2 end to end. The group of supporting members between the main and supplemental frames are foldable but so arranged as to maintain the planes of the her s-cut by the upper and lower runs parallel to the floor and roof of the minechamber, thereby assuring the cutting of kerfsalong the roof and along thefloor to leave surfaces which are substantially-parallel to each other. This is particularly desirable along the floor so as to facilitate movement of the entire machine along its forward path of travel. I

In order to remove the material severed by the cutting mechanism described, a conveyor is provided which maybe moved into.

and out of position beneath the cutter-head.

plate over which the coal is carried, on the return run of the conveyor, the shoulder 105 is continued upwardly to form a flange or guard wall 106, to prevent material being carried by the conveyor, from escaping at the inner edge of the bed plate. A similar wall 107, is provided at the outer edge of the plate. At the side of the plate, along which the conveyor moves forwardly toward the cutter-head, the outer edge of the plate is provided with a peripheral flange 108,

which supports the outer edge of a cover plate 109, secured to the bed plate and spaced above the plate a sufficient distance to permit the travelof the chain 100 and the flights carried thereby, between the bed plate and cover plate. This cover plate, as will be understood from Fig. 1, forms a running board on which the operator may stand, and along which he may walk, in moving from one end of the machine to the other.

As shown in Fig. 13, the plate 103 is provided on its lower side with supporting slides or runners 110, which extend along the edges of the opening of slot 104, at the central portion of the plate. These slides 110, as shown in Fig. 8, rest upon guideways 111, formed on the projections 23, of the main base plate 20. An upwardly extending flange 112, is positioned along'the inner edge of one of the guideways 111, while a guard plate 113, extends upwardly at the inner edge of the other gui-deway 111. As the plate 103, is moved longitudinally on the base plate 20, in aimanner to be described, it is guided in its movement by the flange 112 and the upwardly extending plate 113. The rear portion of the plate 103, as shown in Fig. 13, is provided with a bearing surface 114, which slides over the surface 22. as the plate 103, is moved along the base plate 20. A. pair of shoes 115, are secured to the under surface of the plate 103, near their forward end in position to bear on the mine floor, at opposite sides of the base plate 20, as shown in Figs. 8 and 13.

The plate 103 carries at its forward end, an arcuate-shaped platform 116. This platform, as shown in Fig. 5, is provided with a beveled edge 117, forming a recess in which the flights 101 travel, and also forming a guide for directing material onto the platform 116. At the forward end of the slot 104, the platform 116 is beveled, as shown at'117, so that any material resting on the mine floor in the rear of the beveled portion, will be forced upwardly on the return movement of the plat-form, and onto the upper surface of the conveyor, when the platform is brought back to a position adjacent the base plate 20. The scoop 116 is given the same radius of curvature as the radius of the cutter frame, in: order that its front edge .niay fit closely to the cut formed by the loop cutter. At the forward end of the running board 109, at the point where the conveyor passes from beneath the running board onto the platform 116, a guard arm 119 is positioned for preventing coal from being moved backwardly onto the running board, when the platform is moved forwardly. As will be seen from Fig. 5, the bearing plate 114, which supports the rear end of the conveyor bed plate 103, is spaced downwardly from the plane of the bed plate, and carried on downwardly extending flanges or walls 120. This gives the conveyor bed plate 103 a slight upward inclination rearwardly, so as to raise the rear end of the conveyor a sutlicient height to permit it to discharge onto a supplementary conveyor, as will be described. The bearing plate 114 is continued 'rearwardly to form a ring 121, as shown in Figs. 6, 13 and 14. The ring 121 receives a downwardly extending bearing ring *122, attached to the forward end of the supplementary conveyor 123. This supplementary conveyor 123 is provided with a hoppershaped wall 124, the hopper formed by the wall being located beneath the rear ordischarge end of the conveyor 103, as will be seen from Fig. 2. The conveyor 123 is free to rotate horizontally within the ring 121 to various angular positions, relative to the machine, and is supported in its various positions at its discharge end one flange 125, carried at the rear end of the base plate 20. The conveyor 123 is provided with an endless fiight conveyor 126, which is driven by a motor 127, supported by a bracket 128, secured to the under side of the conveyor. The motor 127 drives a shaft 129, (Fig. 7),. through gearing 130, carrying sprocket Wheels 131, which engage the conveyor 126 to drive the same. I

Carried at the rear of the conveyor bed 103, in a position directly over the supporting plate 114, is a sprocket wheel 132, (Figs. 5 and 14). The sprocket wheel 132 is provided with internal gear teeth 133.

The points of the teeth 133 bear on the outtil aesaeae ing 137, formed in the rear portion of the plate 103. The upper end of the shaft 136 is'journaled at 138, in a casting 139, supported at the rear portion of the conveyor plate 103 by lag screws, which enter threaded openings 140 in the plate. The shaft 138 is driven by a'worm wheel 141, which meshes with a worm 142, driven by a motor 143, mounted on the upper portion of the casting 139. A casing 144 encloses the worm and worm wheel. The-conveyor chain 100 passes around the sprocket wheel 132, and is driven thereby, by means of teeth 145, carried on the outer periphery of the sprocket wheel. The motor 143 for driving the conveyor chain through the mechanism described, is' governed by one of the controllers 41, shown-in Fig. 1. These controllers 41 are secured to the guard wall or plate 113, which guard wall also carries a foot board or platform 146, on which the operator may stand.

As shown in Fig. 2, the casting 139, which carries the motor 143, has a forwardly projecting-portion 150, which carries a second motor 151, and a bearing '152. in which is journaled one end of a threaded shaft 153.-

The ;shaft 153 has secured thereto a worm wheel 154 (Fig. 5), which meshes with a worm 155, driven by the motor 151. A second bearing 156 is provided for the shaft 153, on the side of the worm wheel 154, opposite the bearing 152. In this way. the

. shaft 153 is held from moving longitudinally, relative to the conveyor plate 103, but is journaled for rotation in the bearings described. The shaft is threaded, as shown in Fig. 5. in the standard 24, supported on the extension 23, of the base plate 20. When the motor 151 is driven, the shaft 153 is rotated in its threaded engagement with the standard 4, and thus the conveyor 103 and the plat orm 116 are caused to slide longitudinally, relative to, the main frame of the machine, the direction of movement beingcontrolled by the direction of rotation of the motor 151, which in turn is governed by one of the controllers 41.

The main base plate 20, as shown in Figs. 2. 4, 6 and 12. is provided with a motor 160 for positioning the machine in the mine chamber. The motor 160 is connected through gearing 161, with a shaft 162. which carries a pair of drums 163, on which are wound cables 164. secured at their outer ends to anchors 165, which may be fastened in any suitable manner in the; mine chamber. The cables 164 are each provided with a pair of guide pulleys 166, so that the cables may be conducted in either direction from the machine frame, to enable the frame to be moved either into or out of the mine chamber. The framemay also be'shifted laterally by drawing in on one cable, while the other cable is paid out.

in operationg the' machine may be located in a mine chamber, as shown in the figures of the drawings, and the lower cut will be taken with the platform 116 retracted, as shown in Figs. 1 and 3. With the platform in this position, the cutter-head will he placed in its lowermost position, with the ter has completely severed a section of material from the wall of a mine, it will move away from the material into a position just in front of the edge of the platform 116, as viewed in Fig. 1. The cutter-head may then be slightly raised, so that it will clear the platform, and the platform may then be moved forwardly by means of the motor 151 and the threaded shaft 153, forcing the forward edge of theplatform beneath the severed material. As the platform moves forwardly, the conveyor chain 100 will be driven by the motor 143, and the severed material will be carried backwardly over the bed plate 103 and discharged onto the conveyor 126. which in turn discharges the material at its rear end onto a car, or other transporting medium. After the material severed by the first cut has all been removed, the platform 116 is again retracted, and the cutter-head lowered-to its original position. After th s has been done, the cutter bar may be rapidly swung backwardly to its starting position, and the cutter-head then raised to the proper level for making the second cut. Before the second cut is begun. the platform 116 may again be moved forwardly beneath .It is not necessary that this be done however, as the material may again be completelv severed from the mine wall, and the platform forced beneath it. as was done in the case of the first cut. Either method of operation may be employed. The cutting operation may be repeated as many times as is necessary to work the entire thickness of the mine vein.' After all the material has been removed that can be reached from one position of the machine,the machine is moved forwardly in the chamber, and a second series of cuts taken in the manner described. I

-It should be noted that by means of the rope gearing shown in Figs. 2 and 12 the mainframe 20 may be anchored against rearward movement when the forward scooping edge 117 (Fig. 5) is moved forward to scoop up a load from the mine floor. When the ropes 164 are connected to the ana load.

In the'modified form ot the cutter-head,

shown in Fig. 16, a pair ofcutter chains 170 is provided, one at each side of the cutter frame 11 1. lhese chains are operated by sprocket wheels 17 2, mounted on a shaft 17 3, journaled in bearings 17s, sup orted on the lowerarm of a. yoke member 1 5, similar to the yoke member 46, of the form previously described. The shaft 173 is driven by a spur gear 176, which meshes with a pinion 177, driv en by a motor 178, nounted on the lower arm of the yoke member 175. The;

yoke 175 is rotated about its vertical axis 179 bya motor 180, also supported on the lower arm of the yoke, and arranged to drive a worm 181, which meshes with a worm wheel 182. The worm wheel 182 is rigid with a pinion 183, meshing with a fixed circular rack 18%, secured to the lower bracket 185, of the link 32. By the construction described, since the rotation of the cutter frame is accomplished in a motor independent oi the motor which rives the chains, it is evident that the relative speed of the drive and of the cutter chains may be varied toromply with various conditions of operation. Also the cutter ma be made to operate, while the cutter framers being fed in either direction. This maybe an advantage under some con ditions, since it enables'the operator to make a cut during both the forward and return movement of the cutter frame. In this way, a cut may be made at. one level, while the cutter frame is being ted in one direction, and the cutter-head may be raised or lowered to a different level, and a second cut made during the return movement of the cutter frame.

The modification shown in Fig. 16 is described and claimed in the divisional application, Serial No. 596,214, filed October 23, 1922, for an improvement in mining machines.

Claims 1. Ina mining machine, a support a pair of arms having one end of'each pivotally connected with said support in spaced-relaw tion to one another, a link pivotally connected with the opposite ends of said arms, to form therewith a parallel motion device, and a cutter carried by saidlink, and movable horizontally relative thereto.

2. In a mining machine, a support, a pair of arms pivotally carried by said support, a link pivotally connected with said arms at points removed from said sup ort, to form gherewith a parallel motion; evice, and a loo chain core'cutter carried by said link, an movable horizontally, relative thereto.

nesaeae port, a core cutter-head carried by said parallel motion device, and movable thereby into difierent vertical positions, and a loo chain core-cutter carried by said cutter-hes. and arranged to rotate thereon about an upright axis.

5. In a mining machine, a support, a pa r of arms carried on separate pivots on said support, a cutter-head frame carried by said arms, and-co-operating therewith to form a parallel motion device, a horizontally swinging cutter carried by said cutter-head, and means for moving said arms and cutterhead to adjust said cuttervertically.

6. In a mining machine, a base, a standard supported by said base, a pair of arms having one end-oi each pivotally connected with said standard in spaced. relation thereon, a link pivotally connected to the opposite end of each of said arms, and holding said ends in spaced relation with one another tolform with said arms a parallel motion device, a horizontally swinging cutter-head secured to said link, and a motor for moving said arms vertically to adjust the position of said outter-head. a I

7. Ina mining machine, a base, a standard supported on said base, a pair of arms having one end of each pivotally connected with said standard in spaced relation thereon, a link pivotally connected to the opposite end of each of said arms, to form with said arms aparallel motion device, a horizontally swinging cutter carried by said link, a rack and pinion mechanism for moving said arms vertically, and a motor mounted to move with said arms for operating said rack and said frame, a yoke carried by said frame, and

movable thereon about an upright axis, a loop chain core cutter secured to said yoke. and movable therewith, and a motor carried by said. yoke for operating said loop cutter.

10. In a mining machine, a supporting frame, .a cutter-head frame, a pair of vertically swinging arms pivotally connected with said cutter-head frame for supporting said cutter-head frame in various vertical positions, a loop cutter mounted for movement on said cutter head frame about an upright axis, connections between said arms and said supportin frame and means carried by said cutteread frame for. rotating said cutter about said axis.

11. In a mining machine, a main frame, a loop chain cutter, a platform, means for moving said platform relatively to said main frame into a position beneath said cutter during the operation thereof, and means carried by said platform for removing material severed by said cutter.

12. In a mining machine, a loop chain cutter, means for adjusting said cutter to different vertical positions, a platform, a conveyor carried by said platform, and means for" moving said platform and conveyor into and out of position beneath said cutter.

13. In a mining machine, a loop cutter, means for rotating said cutter about an upright axis for severing material from a mine vein, a platform out of position for receiving the material so severed, a conveyor carried by said platform for transferring material received thereon, and means for moving said platform in a horizontaldirection, to a position beneath said loop cutter.

14. In a mining machine, a kerf cutter, a

parallel motion device for holding said .kerf cutter at various elevations in parallel planes, means for rotating said kerf cutter about an upright axis for cutting a kerf in a mine 'vein, a platform for receiving the material so severed, and means for moving said platform in a horizontal direction, into position to receive dislodged material.

15. In combination, a mining machine frame: severing mechanism carried by said frame at one end thereof, aplatform slidably mounted on said frame, a slideway extending around said platform, an endless conveyor movable on said slideway, a motor mounted on said platform for driving said conveyor, and means for moving said platform to bring the front portion thereof, into and out of position beneath said severing mechanism.

16. In a mining machine, a base plate, a standard carried by said base plate, and extending upwardly therefrom, severing mechanism carried by said standard, a platform guided on said base plate, and having a slot therein, through which said standard p-rojects, and means for moving said platform longitudinally of said base plate, to bring the forward end of said platform into and out of position beneath said severing mechanism.

17. In a mining machine, a base plate, standards extending upwardly from said base 7 plate, severing mechanism carried by said standards for vertical adjustment, relative to said base plate, a platform having a longitudinal central slot therein, through which said standards project, a shaft carried by said platform, and threaded into one of said standards, and means for rotating said shaft to move said platform into and out of position beneath said severing mechanism.

18. In a mining machine, a base plate, a standard mounted on said base plate, severing mechanism mounted on said standard and extending upwardly therefrom, a platform slidably guided on said base plate, and having a longitudinally extending slot therein, through which said standard projects, a shaft rotatably mounted on said platform, and having threaded engagement with said standard, and a motor mounted on said platform, and arranged to rotate said shaft to move said platform into position to receive the material disconnected by said severing mechanism. 1

19. In mining apparatus, the combination with a supporting frame, of dislodging mechanism mounted on'the upper portion of said supporting frame, and loading apparatus comprising a flight conveyor traveling in an approximately horizontal plane and mounted on the lower portion of said supporting frame and capable of reaching forward to various positions to gather dislodged material from the mine floor and move it toward loading position.

20. In mining apparatus, the combination with mechanism for dislodging material from a mine wall, ofloading apparatus for gradually removing material from the base of a mine wall toward loading position by ing mechanism and said loading apparatus. 110.

21. A mining and loading machine comprising loop chain core-cutting mechanism, means for operating the same including the feeding thereof in an arc. a receiving conveyor in position to receive material from said cutter, means for operating said conveyor to take the material back from the mine wall as fast as dislodged, a hopper for receiving the material from said conveyor, and an additional conveyor for taking the. material from said hopper to loading position.

22. A mining and loading machine comprising loopchain core cutting mechanisn'i. means for operating the same including arcuate feed thereof, means for adjusting the height of said core cutter, a conveyor in a position to receive material from said cutter, means for operating said conveyor to remove the dislodged material continuously and piece-meal as soon as'it breaks from the mine wall, an additional conveyor for receiving the dislodged material from the rear end of said first-named conveyor, said additional conveyor being pivoted at such receiving end, and means for operating said additional conveyor. v

28. In a mining machine, the combination with a cutter-head frame, comprising upper and lower arms'spaced from one another, of means for pivotally supporting said outter head, a cutter frame pivoted between said arms on an upright axis and having an unobstructed core-opening theret-hru, an endless chain cutter mounted on said cutter frame to travel about said unobstructed coreopening, means fordriving said chain cutter, and means comprising geaeing'for arcuately moving said cutter frame to effect arcuate feeding movement of said chain cutter while being driven. j

24. In a mining machine, the combination with a supporting frame movable to various elevations, of core-cutting mechanism mounted onsaid frame for arcuate movementabout an upright axis, a parallel motion device for supporting said frame together with said core-cutting mechanism at various elevations while maintaining said axis in upright position, and means for operating said core-cutting mechanism including arcuate feed thereof about said upright axis at such various elevations.

25. In a mining machine, the combination with a supporting frame movable to various elevations, of cutting mechanism carried by said frame for arcuate movement about'a vertical axis, a pivotally supported arm pivotally connected to said frame, and means for cooperating with said arm for adjusting the elevation of said frame while maintaining said axis in vertical position.

26. In a mining machine, the combination with a supporting frame adjustable to various elevations, of core-cutting mechanism having upper and lowerstraight runs extending in horizontal spaced-apart planes and having an unobstructed core-opening therethru, means for supporting said core-cutting mechanism on said frame for arcuate movement on a vertical axis, means for operating said core-cutting mechanism including arcuate movement thereof about said vertical axis, a main frame, and parallel motion mechanism between said main frame and said supporting frame for holding the latter and said core cutting mechanism at various elevations while maintaining said axis in vertical position.

27. In a mining machine, the combination with a main frame, of a supplemental frame,

kerf cutting mechanism mounted on said supplemental frame for arcuate movement about an upright axis in osition for cutting spaced-apart kerfs slmultaneously in generally horizontal planes, a parallel motion device for maintaining said axis upright and said kerf cutting mechanism in position for making such kerfs, mechanism for actuating said parallel motion device to adjust the elevation of said supplemental frame and said kerf cutting mechanism, and

means for operating said kerf cutting mechanism at the various elevations to which it is adjusted.

28. ha mining machine, the combination with a main frame of a pair of supporting arms, separate pivotal supports for adjacent ends of said arms on said main frame, a yoke pivotally connected to the opposite endsof said arm, and cutting mechanism mounted between the forwardly extended arms of. said yoke for arcuate movement'between the upright axis, means connected between said parallel motion device and said supporting frame to adjust the elevation of said corecutting mechanism while said axis is maintained inupright position by said parallel motion device, and means for operating said core cuttin-g mechanism at the various elevations to which it is adjusted.

30. In a mining machine, the combination with a supporting'frame, of a pair of arms pivotally connected to said supporting frame for up and down movement, a supplemental frame pivotally connected to said arms and movable up and down therewith, core-cutting mechanism mounted on said supplemental frame to swing thereon about an upright axis, and means connected between one of said arms and said supporting frame for adjusting the elevation of said core-cutting mechanism while said axis is maintained in upright. position by said arms.

31. In a mining machine, the combination with a base frame adapted to rest on the floor of a mine chamber, of a standard supported by said base, a pair of arms pivotally connected to said standard in spaced-apart relation and extending forwardly from said standard, a yoke having spaced-apart forwardly extending supporting members and an intermediate link portion pivotallyconnected to the forward end of said arms to hold the latter in spaced-apart relation and to form with said arms a parallel motion device, core-cutting mechanism supported by said spaced-apart forwardly extending members for arcuate movement about an upright axis means for operating said core-cuttlng mechanism including arcuate feeding'movement thereof about said upright axis, and rack and pinion mechanism for moving said arms vertically about their pivotal supports on said standard to adjust the elevation of said core-cutting mechanism while said parallel motion device maintains said axis in upright position. i

32. In a mining machine, the combination with kerf cutting mechanism, of means for supporting said kerf cutting mechanism for movement about an upright axis, a pivotally supported apparatus for carrying said supporting means and said cutting mechanism while maintaining said axis upright for the various positions to which said cutting mechanism is adjusted in elevation, mechanism applied to said pivotally supported apparatus at only one portion thereof for adjusting the elevation of said cutting mechanism, and means for operating said cutting mechanism in substantial horizontal planes independently of the elevation of said cutting mechanism.

33. In a mining machine, the combination with a main frame, of cutting apparatus mounted on said frame, means for adjusting the elevation of said cutting apparatus between the floor and roof of a mine chamber, a platform movable forwardly and rearwardly in advance of said frame,'means for retracting said frame when said cutting apparatus operates at the floor of the mine chamber, a conveyorcarried by said platform, and means for moving said platform and said conveyor forwardly in advance of said main frame to a receiving position beneath said cutting apparatus when the latter is adjusted to a position above the floor of the mine chamber.

34. In a mining machine, the combination with a main frame, of cuttingapparatus mounted on said main frame and extending to cutting positions in advance thereof and across an upright mine wall, a conveyor frame movable forwardly and rearwardly in advance of said main frame, a conveyor carried by said conveyor frame, means for adjusting said cutting} apparatus to a position for making a cut across the mine wall at the floor of the mine chamber and to positions for making cuts across the mine wall above said floor, and means for retracting said conveyor frame while'said cutting apparatus is making the floor cut and for advancing said conveyor frame to place said conveyor beneath said cutting apparatus while making cuts across the mine wall above the floor thereof.

35. In a mining machine, the combination with dislodging mechanism, means for ad justing said dislodging mechanism for operation at the base of a mine wall along the floor of the mine chamber, a receiving platform, a flight conveyor mounted on said platform for operation in a substantially horizontal plane at the forward end of said platform, means for retracting said platform and said conveyor while said dislodging mechanism is operating at the base of the mine wall and along the floor of the mine chamber and for advancing said platform and conveyor into receiving position when higher elevation, means for adjusting the elevation of said dislodging mechanism, and means for operating said conveyor for transferring material from said platform.

36. In a mining machine, the combination with a main frame, of cutting apparatus mounted in said main frame and extending in advance thereof in position for arcuate movement across the mine wall at various elevations including the floor base of the mine wall, means for operating said cutting apparatus at such elevations, means for adjusting the elevation of said cutting apparatus, and arcuate platform conforming to the curvature of the arcuate feeding movement of said cutting apparatus and connected to said main frame to extend in advance thereof along the floor of the mine chamber tothe base of the mine wall, and means for moving said platform to retracted position adjacent the forward end of said main frame while said cutting apparatus is operating along the base of the mine wall and for moving said platform to forward position beneath the cutting apparatus when the latter is operating at a higher elevation.

37. In a mining machine, the combination with a main frame, of dislodging apparatus mounted thereon and capable of dislodging material from an upright mine wall at the base thereof onto the floor of the mine chamber, a comparatively wide closed platform connected to said main frame and extending in advance thereof along the floor of the mine chamber toward the base'of the mine wall, and means for imparting rectilinear movement to said platform relatively to said main frame beneath the dislodged material and leaving said platform in stationary receiving position below the range of operation of said dislodging apparatus.

- 38. In a mining machine, the combination with a main frame, of dislodging apparatus mounted thereon and extending in advance thereof for operation on an upright mine wall, a platform having a forward bevelled edge. means for moving said platform forwardly relatively to said main frame to force said platform beneath the dislodged material, and endless traveling conveyor mechanism on said platform for moving the '76 said dislodging mechanism is operating at a dislodged material toward loading position while said platform remains in stationary receiving position;

39. In a mining machine, the combination with a main frame, of core-cutting mechanism mounted on said frame for operation on a mine wall in advance of said frame, a platform connected to said frame and extending in-advance thereof for movement relatively to said frame into and out of receiving position beneath said core-cutting ward end of said platform into and out of receiving position beneathsaid severing mechanism, additional conveyor mechanism at the rear end of said main frame, and mechanism for maintaining communication between said first named conveyor and said additional conveyor mechanism whilesaid platform is in its various positions.

41. A mining and loading machine, comprising a stationary supporting frame, dislodging apparatus mounted on said frame for operation across an upright mine wall at the base thereof and at higher elevations,

a platform'connected to said frame and having a portion of the periphery thereof bevelled, said platform being movable relatively to said frame and in advance thereof while said frame remains stationary, and mechanism comprising a screw connected to said stationary frame for forcing the beveled portion of said periphery beneath the dislodged material and into receiving position beneath said dislodging apparatus.

42. A mining and loading machine. comprising a stationary supporting frame, dislodging apparatus mounted on said frame for operation on an upright mine wall along the base thereof in advance of said frame and at higher elevations, a platform connected to said frame for movement relatively thereto in advance thereof, a conveyor mounted on said platform for transferring toward loading position material received by said platform, mechanism comprising a screw connected to said stationary frame for forcing said platform together with said conveyor beneath the material dislodged at the base of the mine wall and into rec iving position under the dislodging apparatus while the latter is operating at its higher positions, and a motor for operating said screw.

43. A mining and loading machine, comprising a stationary frame, dislodging apparatus mounted on said frame for operation along the base of a mine wall and at positions above such base, a platform movably mounted on said 'frameand having a slideway extending around the forward portion thereof, a conveyor mounted on said platform to .travel along said slideway, a motor connected to said conveyor to operate the same and mechanism comprising a motor connected to a screw on said stationary frame for forcing said platform and conveyor forwardly relatively to said frame while said frame remains stationary to move said platform under the material dislodged at the base of the mine wall and leave said platform in receiving position beneath the dislodging apparatus during the operation of the latter above such base.

44. A mining and loading machine comprising supporting frame-work, dlslodging mechanism mounted thereon a platform connected to said frame-work and movable forwardly to a receiving position under said dislodging mechanism, a conveyor movable on said platform for transferring dislodged material toward loading posltion, a cover plate for that run of the conveyor extending toward loading position to form a chute to cooperate with said conveyor in directing dislodged material toward loading position, means for forcin said platform and conveyor under dislodged material and into receiving position beneath said dislodging mechanism, and a guard plate at theforward end of said cover plate in position for preventing material from bein deposited on said cover plate by causing t e materlal to pile up against said guard plate while being gradually removed by said conveyor into and along said chute.

45. A mining and loading machine, comprising a main frame, means mounted thereon for dislodging material from the solid mass of a mine wall, loading apparatus comprising a scooping frame and a traveling conveyor mounted thereon, said loading apparatus having an initial position spaced back from the solid mass of the mine wall, and means for extending said loading apparatus into the position occupied by such solid mass after such dislodging mechanism has operated and leaving it in such position while said conveyor operates to gradually remove such dislodged material toward loadmg position.

46. In a mining machine, the combination with a supporting frame, of a supplemental frame, core-cutting mechanism having upper and lower runs in spaced-apart parallel horizontal planes and an unobstructed coreopening therethrough, a third frame for supporting said core cuttiitg mechanism, an electrlc motor mounted on said third frame 

